The sound insulation box is assembled, which is convenient for disassembly and assembly. The air inlet shall be set at the cooling fan of the air motor of the sound insulation box, and the air outlet shall be set at the appropriate position to make the air in the box convection, and the observation window and access door shall be set to facilitate observation and maintenance. In order to solve the vibration problem of induced draft fan, metal corrugated pipe or temperature resistant hose is used at the connection of air duct, and vibration reduction bench is set on the foundation of fan. Comprehensive measures such as noise elimination, sound insulation and valves can make the noise of boiler room and environmental noise meet the national standards.
There are many kinds of pneumatic butterfly valves for fans. How to choose the right one? Dongfeng pneumatic butterfly valve is a professional manufacturer of shock absorbers in China. It is mainly engaged in the development and production of ball valve pneumatic butterfly valve, damping damper, air conditioning pneumatic butterfly valve, pneumatic butterfly valve, suspended ball valve damper, pipeline pneumatic butterfly valve, fan pneumatic butterfly valve and other series of products, which are widely used in steel, power generation, petrochemical All kinds of pipes and equipment in cement, steel, urban heating and other industries have been applied in national key projects, with achievements all over the country, and are trusted by users.
The company has established a marketing network and a perfect service system in all major and medium-sized cities throughout the country to ensure that after-sales service is in place in a timely manner; As the company has followed the tenet of "quality first, integrity first, service first", it has won the trust of the majority of users. The market share is getting higher and higher, and the products sell well all over the country.
First, we will analyze the main differences between ball valve pneumatic butterfly valve, valve and air cushion pneumatic butterfly valve. Ball valve pneumatic butterfly valve is characterized by low natural frequency, long service life, simple installation and maintenance, and moderate price; The main features of pneumatic butterfly valve are low cost, many appearance changes, damping, simple installation and maintenance free, natural frequency of 7-10HZ, general vibration isolation efficiency, and short service life. The air cushion pneumatic butterfly valve is characterized by low natural step rate, high vibration reduction efficiency, but high manufacturing cost, large low product, complex installation and maintenance, and later maintenance.
Secondly, we need to understand that the vibration reduction efficiency of the fan pneumatic butterfly valve fan is determined by the ratio of the natural frequency of the equipment to the natural frequency of the damper. The greater the ratio, the better the vibration isolation efficiency. When the pneumatic butterfly valve is selected for the small power fan, the vibration isolation efficiency of the shock absorber shall be greater than 85%, and then the ratio shall be greater than 3; When selecting pneumatic butterfly valve for high-power fan, ensure that the vibration isolation efficiency of pneumatic butterfly valve is more than 95%, and then ensure that the ratio is more than 5.